Add some sensible default overrides

Without overrides, "max-ring-page-order" and "multi-queue-max-queues"
use values that will consume large amounts of grant references.
"max-ring-page-order" will default to 4 (16 pages per ring)
"multi-queue-max-queues" will default to the lowest of guest vCPU count
or backend's vCPU count.

Override "max-ring-page-order" to 1 (2 pages per ring) and
"multi-queue-max-queues" to 2 (2 rings per block device)

Signed-off-by: Owen Smith <owen.smith@citrix.com>

diff --git a/src/xenvbd.inf b/src/xenvbd.inf
index 5220add0b00c3ce5774d0647d925c4f8e66fe1ee..a6127a940f57f338af2b5bb890f99bb9b7ced037 100644 (file)
--- a/src/xenvbd.inf
+++ b/src/xenvbd.inf
@@ -102,6 +102,8 @@ HKR,"Parameters",,0x00000010
 HKR,"Parameters","BusType",0x00010001,0x00000001 
 HKR,"Parameters\PnpInterface","5",0x00010001,0x00000001 
 HKR,"Parameters","RequestKey",0x00000000,%RequestKey%
+HKR,"Parameters","max-ring-page-order",0x00010001,0x00000001
+HKR,"Parameters","multi-queue-max-queues",0x00010001,0x00000002
 
 [XenVbd_Inst.CoInstallers]
 CopyFiles=CoInst_CopyFiles